Casting car wheels



Aug. 16, 1932. OBB .R 1,871,586

CASTING CAR WHEELS Filed Feb. 24, ]950 Patented Aug. 16 1932 CHARLESGQBB, J'R., OF MARSHALL TEXAS CASTING can WHEELS Application filedFebruary 24, 1930. Serial No. 430,957.

This invention relates to an improvement in casting car wheels.

v The standard car wheel used at'the present time by railroads has aheavy'solid hub. These wheels, as now cast, according to stand ardmethods, cool veryslowly on account of the mass of metal in the hubs,and it takes about fifty minutes to cool. each Wheel so that it may-behandled and carried to the annealing pits.

rily cast by a round straight core, which is objectionable on account ofthe slow'cooling incident to the mass of metal in the hub.

The object of this invention is to secure a more rapid cooling of thehub in relation to the cooling of the other sections of the wheel, thusenabling each wheel to be shaken out ofthe mold and pitted hotter and inquicker time than in ordinarypractice.

This result may be accomplished by inserting a metal ring in the mass ofthe hub near the centelywhich metal ring may be initially attached tothe core by .wire nails or the like.

In the accompanying drawing:

Fig. 1 is a top plan View of. a form of I core;and

Fig. 2 is a side elevation partly in section of the same.

The core, whichis usually of molded sand, has its opposite ends usuallybevelled to provide seats in the mold to rigidly hold the core in placeand against displacement, and as shown in Figs. 1 and 2, the core 7 hasametal ring 12 surrounding the same near the center and is attached tothe center core by suitable means, as Wire nails 13. or the,

like. This metal ring 12 is embedded in the mass of the metal formingthe hub of the wheel and causes the wheel to cool much quicker thanordinarily.

the impression of the Wheel and the cavity for the metal. The core 7 issecured in place These wheels are ordina and the casting removed in theusual way.

By means of using the ring 12. aroundthecore, the metal in the hub isdivided to a more uniform section. It has been found that with'thismethodit is possible to shake out and pit the wheels about ten minutesquicker than in the ordinary way, whichlatter required about fiftyminutes for astandard 750# wheel. v

With this production, a much better product is produced than heretofore,improving the essential strength ofthe wheels under the prescribed dropand thermal tests.

I claim:

1. In a mold for casting car wheels With hubs, a core for forming thehub of the Wheel, and hav ng a metall c cooling ring surroundlng thecorein spaced relation and attached to the circumference thereof to excuinference of the core. r I

In testimony whereof I have signed my name, this 12th day of February,in the year one thousand nine hundred and thirty.

CHARLES COBB, JR.

- hers forisupporting'the ring from the cir- V in the mold with its ringextending 'outwardly therefrom. As the metal is poured,

it flows through the chamber or cavity and about the ring 12 surroundingthe core 7 50 After cooling sufiiciently, the mold is opened

